STRSPNSection: Linux Programmer's Manual (3)
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NAMEstrspn, strcspn - search a string for a set of characters
#include <string.h> size_t strspn(const char *s, const char *accept); size_t strcspn(const char *s, const char *reject);
DESCRIPTIONThe strspn() function calculates the length of the initial segment of s which consists entirely of characters in accept.
RETURN VALUEThe strspn() function returns the number of characters in the initial segment of s which consist only of characters from accept.
CONFORMING TOSVr4, 4.3BSD, C89, C99.
SEE ALSOindex(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strsep(3), strstr(3), strtok(3), wcscspn(3), wcsspn(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.